Happy Birthday Cake Slice

Featured in: Garden-Inspired Meals

This moist vanilla sponge is light and fluffy, layered with silky buttercream frosting and topped with colorful sprinkles for a joyful touch. Preparation involves creaming butter and sugar, adding eggs and vanilla, then mixing flour and leavening agents alternately with milk. After baking, the cake cools before being sliced horizontally to add creamy frosting between layers and all over the sides and top. The colorful sprinkles add festive flair, making it an ideal sweet treat for celebrations.

Updated on Thu, 04 Dec 2025 09:46:00 GMT
Slice of Happy Birthday Cake, a celebratory dessert topped with colorful sprinkles and creamy frosting. Pin
Slice of Happy Birthday Cake, a celebratory dessert topped with colorful sprinkles and creamy frosting. | toastybasil.com

A festive, moist vanilla sponge cake layered with creamy buttercream and topped with colorful sprinkles—a joyful treat perfect for any celebration.

This cake has been our go-to for every birthday celebration bringing smiles to everyone.

Ingredients

  • For the Sponge Cake: 1 2/3 cups (210 g) all-purpose flour, 1 cup (200 g) granulated sugar, 1/2 cup (115 g) unsalted butter softened, 3 large eggs at room temperature, 1/2 cup (120 ml) whole milk, 2 tsp baking powder, 1/2 tsp salt, 1 tbsp pure vanilla extract
  • For the Buttercream Frosting: 1 cup (225 g) unsalted butter softened, 3 cups (360 g) powdered sugar sifted, 2 tbsp whole milk, 1 tsp pure vanilla extract, Pinch of salt
  • For Decoration: 1/4 cup (40 g) colorful sprinkles

Instructions

Preheat oven:
Preheat the oven to 350°F (175°C). Grease and line an 8-inch (20 cm) round cake pan with parchment paper.
Cream butter and sugar:
In a large bowl, cream together the butter and sugar until light and fluffy about 3 minutes.
Add eggs and vanilla:
Beat in the eggs one at a time mixing well after each addition. Stir in the vanilla extract.
Mix dry ingredients:
In a separate bowl whisk together the flour baking powder and salt.
Combine ingredients:
Add the dry ingredients to the wet mixture in three parts alternating with the milk beginning and ending with the flour. Mix until just combined.
Prepare batter:
Pour the batter into the prepared cake pan and smooth the top.
Bake:
Bake for 28-32 minutes or until a toothpick inserted in the center comes out clean.
Cool cake:
Let the cake cool in the pan for 10 minutes then turn out onto a wire rack to cool completely.
Make frosting:
For the frosting beat the butter until creamy. Gradually add powdered sugar milk vanilla and salt beating until smooth and fluffy.
Assemble cake:
Once the cake is completely cool slice it horizontally to create two layers. Spread frosting between the layers and over the top and sides.
Decorate:
Decorate with colorful sprinkles. Slice and serve.
Moist vanilla slices of Happy Birthday Cake, ready to eat and frosted with smooth buttercream. Pin
Moist vanilla slices of Happy Birthday Cake, ready to eat and frosted with smooth buttercream. | toastybasil.com

Every family birthday is incomplete without slicing this cake and sharing joyful stories together.

Notes

Pairs well with sparkling wine or fresh lemonade.

Required Tools

8-inch (20 cm) round cake pan Electric mixer Mixing bowls Rubber spatula Wire rack Serrated knife

Allergen Information

Contains eggs milk wheat (gluten) and dairy. Check all packaged decorations for potential allergens.

Festive slice of Happy Birthday Cake boasting fluffy cake layers and vibrant, delicious sprinkles. Pin
Festive slice of Happy Birthday Cake boasting fluffy cake layers and vibrant, delicious sprinkles. | toastybasil.com

This cake combines classic flavors with a festive look for memorable celebrations.

Recipe Q&A

What makes the sponge moist?

The combination of softened butter, eggs, and milk contributes to a tender and moist sponge texture.

How is the buttercream frosting prepared?

Butter is beaten until creamy, then powdered sugar, milk, vanilla, and a pinch of salt are added gradually and whipped until smooth and fluffy.

Can the cake be flavored differently?

Yes, substituting part of the flour with cocoa powder creates a chocolate variation, and adding fruit jam layers enhances flavor.

What is the ideal baking temperature and time?

Bake at 350°F (175°C) for about 28 to 32 minutes, or until a toothpick inserted in the center comes out clean.

How should the cake be cooled before frosting?

Allow the cake to cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely before layering with frosting.

What decorations are used?

Colorful sprinkles are added on top for a festive finish, adding both visual appeal and texture.

Happy Birthday Cake Slice

Moist vanilla sponge layered with creamy buttercream and colorful sprinkles, ideal for festive occasions.

Prep duration
25 min
Cooking duration
30 min
Complete duration
55 min


Skill level Medium

Origin International

Yield 8 Portions

Dietary specifications Vegetarian

Components

Sponge Cake

01 1 2/3 cups all-purpose flour
02 1 cup granulated sugar
03 1/2 cup unsalted butter, softened
04 3 large eggs, room temperature
05 1/2 cup whole milk
06 2 teaspoons baking powder
07 1/2 teaspoon salt
08 1 tablespoon pure vanilla extract

Buttercream Frosting

01 1 cup unsalted butter, softened
02 3 cups powdered sugar, sifted
03 2 tablespoons whole milk
04 1 teaspoon pure vanilla extract
05 Pinch of salt

Decoration

01 1/4 cup colorful sprinkles

Directions

Step 01

Prepare Oven and Pan: Preheat oven to 350°F. Grease and line an 8-inch round cake pan with parchment paper.

Step 02

Cream Butter and Sugar: In a large bowl, beat butter and sugar together until light and fluffy, approximately 3 minutes.

Step 03

Incorporate Eggs and Vanilla: Add eggs one at a time, mixing well after each addition. Stir in vanilla extract.

Step 04

Combine Dry Ingredients: Whisk together flour, baking powder, and salt in a separate bowl.

Step 05

Mix Batter: Add dry ingredients to wet mixture in three parts, alternating with milk, starting and ending with flour. Mix until just combined.

Step 06

Bake Sponge: Pour batter into prepared pan and smooth surface. Bake for 28-32 minutes, or until a toothpick inserted in the center comes out clean.

Step 07

Cool Cake: Allow cake to cool in pan for 10 minutes, then transfer to a wire rack to cool completely.

Step 08

Prepare Frosting: Beat butter until creamy. Gradually add powdered sugar, milk, vanilla extract, and salt, beating until smooth and fluffy.

Step 09

Assemble Layers: Slice cooled cake horizontally to create two layers. Spread frosting between layers and over top and sides.

Step 10

Decorate and Serve: Top with colorful sprinkles. Slice into portions and serve.

Necessary tools

  • 8-inch round cake pan
  • Electric mixer
  • Mixing bowls
  • Rubber spatula
  • Wire rack
  • Serrated knife

Allergy information

Review each component for possible allergens and if uncertain, we recommend consulting with a healthcare professional.
  • Contains eggs, milk, wheat (gluten), and dairy. Verify decorations for possible allergens.

Nutrient breakdown (per portion)

These values are provided as a general guide and shouldn't replace professional medical advice.
  • Calories: 430
  • Fat: 21 g
  • Carbs: 57 g
  • Protein: 4 g